Sho SHIMIZU | c0e010dd | 2016-05-02 14:46:22 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onlab.util; |
| 17 | |
| 18 | import com.google.common.annotations.Beta; |
| 19 | import com.google.common.collect.DiscreteDomain; |
| 20 | import com.google.common.collect.Range; |
| 21 | |
| 22 | import java.util.Objects; |
| 23 | |
| 24 | /** |
| 25 | * Represent a closed-open range. |
| 26 | * The primary user of this class is the ResourceService implementation. |
| 27 | */ |
| 28 | @Beta |
| 29 | public final class ClosedOpenRange { |
| 30 | private final int lowerBound; // inclusive |
| 31 | private final int upperBound; // exclusive |
| 32 | |
| 33 | /** |
| 34 | * Creates a range from a Guava's range. |
| 35 | * |
| 36 | * @param range Guava's range |
| 37 | * @return this range |
| 38 | */ |
| 39 | public static ClosedOpenRange of(Range<Integer> range) { |
| 40 | return new ClosedOpenRange( |
| 41 | range.canonical(DiscreteDomain.integers()).lowerEndpoint(), |
| 42 | range.canonical(DiscreteDomain.integers()).upperEndpoint()); |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Create a range with a lower bound and an upper bound. |
| 47 | * |
| 48 | * @param lowerBound lower bound (inclusive) |
| 49 | * @param upperBound upper bound (exclusive) |
| 50 | * @return this range |
| 51 | */ |
| 52 | public static ClosedOpenRange of(int lowerBound, int upperBound) { |
| 53 | return new ClosedOpenRange(lowerBound, upperBound); |
| 54 | } |
| 55 | |
| 56 | private ClosedOpenRange(int lowerBound, int upperBound) { |
| 57 | this.lowerBound = lowerBound; |
| 58 | this.upperBound = upperBound; |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Returns the lower bound. |
| 63 | * |
| 64 | * @return the lower bound |
| 65 | */ |
| 66 | public int lowerBound() { |
| 67 | return lowerBound; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Returns the upper bound. |
| 72 | * |
| 73 | * @return the upper bound |
| 74 | */ |
| 75 | public int upperBound() { |
| 76 | return upperBound; |
| 77 | } |
| 78 | |
| 79 | @Override |
| 80 | public int hashCode() { |
| 81 | return Objects.hash(lowerBound, upperBound); |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | public boolean equals(Object obj) { |
| 86 | if (this == obj) { |
| 87 | return true; |
| 88 | } |
| 89 | |
| 90 | if (!(obj instanceof ClosedOpenRange)) { |
| 91 | return false; |
| 92 | } |
| 93 | |
| 94 | final ClosedOpenRange other = (ClosedOpenRange) obj; |
| 95 | return Objects.equals(this.lowerBound, other.lowerBound) |
| 96 | && Objects.equals(this.upperBound, other.upperBound); |
| 97 | } |
| 98 | |
| 99 | @Override |
| 100 | public String toString() { |
| 101 | return "[" + lowerBound + ".." + upperBound + ")"; |
| 102 | } |
| 103 | } |